Not enough input arguments. when using "gamultiobj"

Question

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I am using the below code for multi objective optimization.

 D = [4, 3, 6, 8, 12, 4, 19, 13, 6, 8];
 F = [20, 12, 40, 26, 10, 32, 19, 47, 11, 15];
 T = 120;
 H = round(rand(10,10));
 nvars = 10;
 A = -F;
 b = -T;
 Aeq = [];
 Beq = [];
 lb = zeros(10,1);
 ub = ones(10,1);
 x = gamultiobj(fitnessfcn,nvars,A,b,Aeq,Beq,lb,ub,mycon);
 function xsum= constraint2(var,H)
    xsum=0;
    for i=1:length(H)
        for j=i+1:length(H)
            xsum=xsum+H(i,j)*var(i)*var(j);
        end
    end    
 end
 function [c,ceq] = mycon(x,H)
    c = [];
    ceq = constraint2(x,H);
 end

I am getting the below error. Can any one please indicate the problem?

 Not enough input arguments.
 Error in test1>mycon (line 36)
    ceq = constraint2(x,H);
 Error in test1 (line 23)
 x = gamultiobj(fitnessfcn,nvars,A,b,Aeq,Beq,lb,ub,mycon);